Rhodium (Rh)

Rhodium is a chemical element with symbol Rh and atomic number 45. It is a rare, silvery-white, hard, corrosion-resistant, and chemically inert transition metal.

Atomic Number

45

Atomic Mass

102.91 u

Category

transition metal

Phase

solid

Density

12.41 g/cm³

Electron Shells

2, 8, 18, 16, 1

Atomic Structure

Protons: 45 • Electrons: 45 • Neutrons: Varies by isotope

Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s¹ 4d⁸

Discovery

1803 • William Hyde Wollaston